Nvidia’s new GTX 690 introduced last week is the first dual-GPU AIB that challenges the notion that one card can’t compete with two. In our tests, the new Nvidia board not only crushes the former heavyweight champion, the limited-edition ASUS Mars II goliath, but shows performance on par with GFX 680s in SLi. We are seeing comparative scores with two GTX 680s because the GTX base and boost clocks are only about 5% less than a standalone GTX 680.Compare that to the previous generation dual GPU card, the GTX 590, which was outfitted with GPUs whose a base clocks were more than 20% slower than the GTX 580 (to manage heat).